Boiler tube and sheet joint.



wa m; Jones, or FALLS our, Nnsnssm.

TUBE AND SHEET JOINT.

Specification of Letters Patent.

Application filed December 12, 1916. SeriaI No 186,519.

To all whom it may concern: 7 a 'g. 1

Be it known .that 1,-WALTER A. JONES, a citizen of the United States,residing at Falls City, in the county of Richardson and State ofNebraska, have invented a new and'useful Boiler Tube and Sheet Joint, of

'which the following is a specification.

.The present invention appertains generally to boilers, and relates moreparticularly to the joints between boiler sheetsand tubesi It is theobject of the invention to provide novel and improved means forassembling the boiler tubes with the sheets, whereby the joints areprotected from the heat as much possible as Well as inequalities inexpansion and contraction which '-not infrequently result in leakage,the present in vention eliminating the necessity of expandingor headingthe tubes as now done.

he invention also has for its object the provisionof means of thecharacter indicated which enables the tubes'to be readily 'andeffectively assembled with the sheets, the construction being simple butnevertheless thoroughly efiective.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts andin the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within thescope of what is claimed without departing from the spirit of theinvention.

The invention is illustrated inthe accompanying drawing, wherein: I

Figure 1 is a diametrical section through the joint claimed.

Fig; 2 is a cross section takenon the line 2-2 of Fig. 1.

In the drawings, the numeral. 1 designates the boiler sheet and. 2 theboiler tube.

In carrying out the invention, the sheet 1 is provided around each ofits boiler tube openings 3 with an imvardly-projecting annular boss 40fsuitable length, and which is exterior-1y tapered from its base to itsedge,'the opening 3 which extends through the boss 4 being ofsubstantially the di beveled surfaces 5 and J.

ameter of the opening or bore of the tube 2. The wall of the boss .4increases in thickness from the edge of said boss to the base thereof,whereby to strengthen the wall of the boss. The boss or annular lip 4 isread ily formed by punching the metal of the sheet 1 inwardly by meansof suitable dies or forging process. The wall of the boss 4 is of athickness at the edge of said boss of substantially the same thicknessas the wall of the tube 2, whereby the expansion and contraction of theedge ortion of the boss 4: and tube 2 will be equa It is to be notedthat the edge of the boss 4 has an inner annular beveled surface 5.

r The drawings illustrate what is termed a butt lap weld, in that theend of tube 2 is provided with an inner annular beveled 1 surface 6 withthe edges formed by the beveled surfaces 5 and 6 abutting. A ring '7 isdisposed between and Within the adjacent portions of the boss 4 and tube2, and is provided with a V-shaped fining a doubled beveled sur ace to tthe The, ring 7 is welded to the boss 5 and tube 2, whereby it bservesas a union uniting the boss and to e.

is claimed as new is Ina boiler, a sheet having an opening and providedwith a boss surrounding the opening; a tubecooperating with the end ofthe boss, the tube and the boss being in contact and being internallybeveled in opposite directions to define a Vshaped circumscribing groovein the interior of the boss and tube and closed on its outer side and aring within the boss and the tube, the ring being V-shaped in crosssection to conform to the groove, the ring being welded to the beveledsurfaces of the boss which define the groove.

In testimony that I clairn the foregoing as my own, I have heretoailixed my signature in the presence of two witnesses.

WALTER A. J ONES.

Witnesses: Y

JAB. Kim, B. 0. Cam

Patented Aug. '19, 1919.

Having thus described the invention, what and the tube peripher de-

